Guardian Post Alarms To Multiple Slack Channels

With the latest release of the Guardian Bearse feature it now supports creating multiple independent Guardian stacks. This can be useful for managing alarms for different applications or environments within the same AWS account and AWS region.

To enable this feature simply create additional yaml configuration files in the Guardian code commit repo using the naming convention of <name>.alarms.yaml. The name used in the configuration file name is used in the cloudformation stack name.